Cross-section semi-round. Outline wavy. Culm center filled. Epidermis with hairs. Continuous peripheral sclerenchymatic belt. Large vascular bundles in one row. Solitary large vascular bundles. Sclerenchymatic sheath around vascular bundles with 1-3 cells
Outline with rips. Upper epidermis cells in one row. Epidermis with hairs. Vascular bundles centered between the upper and lower side of the leaf. Girders extending from the vascular bundle to both sides of the leaf.